linux-kernel - [PATCH 01/11] splice: copy_splice_read: do the I/O with IOCB

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Date:   Mon, 16 Oct 2023 22:35:37 +0200
From:   Ahelenia Ziemiańska 
        <nabijaczleweli@...ijaczleweli.xyz>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 01/11] splice: copy_splice_read: do the I/O with IOCB_NOWAIT

Otherwise we risk sleeping with the pipe locked for indeterminate
lengths of time.

Link: https://lore.kernel.org/linux-fsdevel/qk6hjuam54khlaikf2ssom6custxf5is2ekkaequf4hvode3ls@zgf7j5j4ubvw/t/#u
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@...ijaczleweli.xyz>
---
 fs/splice.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/splice.c b/fs/splice.c
index d983d375ff11..9d29664f23ee 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -361,6 +361,7 @@ ssize_t copy_splice_read(struct file *in, loff_t *ppos,
 	iov_iter_bvec(&to, ITER_DEST, bv, npages, len);
 	init_sync_kiocb(&kiocb, in);
 	kiocb.ki_pos = *ppos;
+	kiocb.ki_flags |= IOCB_NOWAIT;
 	ret = call_read_iter(in, &kiocb, &to);
 
 	if (ret > 0) {
-- 
2.39.2

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